Red Hat ENTERPRISE LINUX 5 - LOGICAL VOLUME MANAGER ADMINISTRATION Manual page 83

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PV /dev/sdg1

PV /dev/sdg2

PV /dev/sdh1

PV /dev/sdh2

PV /dev/sda1

PV /dev/sda2

Total: 16 [2.11 TB] / in use: 14 [949.65 GB] / in no VG: 2 [1.18 TB]

Next you extend the original volume group with the new physical volume.

[root@link-08 ~]# vgextend vg /dev/sda[12]

Volume group "vg" successfully extended

[root@link-08 ~]# pvscan

PV /dev/sdb1

PV /dev/sdb2

PV /dev/sdc1

PV /dev/sdc2

PV /dev/sdd1

PV /dev/sdd2

PV /dev/sde1

PV /dev/sde2

PV /dev/sdf1

PV /dev/sdf2

PV /dev/sdg1

PV /dev/sdg2

PV /dev/sdh1

PV /dev/sdh2

PV /dev/sda1

PV /dev/sda2

Total: 16 [2.11 TB] / in use: 16 [2.11 TB] / in no VG: 0 [0

Convert the linear volume back to its original mirrored state.

[root@link-08 ~]# lvconvert -m 1 /dev/vg/groupfs /dev/sda1 /dev/sdb1 /dev/

sdc1

Logical volume mirror converted.

You can use the lvs command to verify that the mirror is restored.

[root@link-08 ~]# lvs -a -o +devices

Copy% Devices

groupfs

68.62 groupfs_mimage_0(0),groupfs_mimage_1(0)

[groupfs_mimage_0] vg

/dev/sdb1(0)

VG vg